geostationary

[ jee-oh-stey-shuh-ner-ee ]
/ ˌdʒi oʊˈsteɪ ʃəˌnɛr i /

adjective

of or relating to a satellite traveling in an orbit 22,300 miles (35,900 km) above the earth's equator: at this altitude, the satellite's period of rotation, 24 hours, matches the earth's and the satellite always remains in the same spot over the earth: geostationary orbit.
Also ge·o·syn·chro·nous [jee-oh-sing-kruh-nuh s] /ˌdʒi oʊˈsɪŋ krə nəs/.

Origin of geostationary

First recorded in 1960–65; geo- + stationary

British Dictionary definitions for geostationary

geostationary
/ (ˌdʒiːəʊˈsteɪʃənərɪ) /

adjective

(of a satellite) in a circular equatorial orbit in which it circles the earth once per sidereal day so that it appears stationary in relation to the earth's surface Also: geosynchronous